ga·lac·tic \gəˈlaktik, -tēk\adjective Etymology: Late Latin galacticus milky, from Late Greek galaktikos, from Greek galakt-, gala milk + -ikos -ic 1.: of or relating to a galaxy (as the Milky Way) 2.: extremely great : huge < a galactic profusion of merchandise — Steelways > < the galactic figure of one trillion, 370 billion francs — Time >